1. You can download additional Color Themes for the Winamp Bento Skin (Modern Skin).
2. You can post your own Color Themes.

Color Themes are a set of special text files that determine the look of Winamp skins. Each element is displayed in the appropriate color. This text files are written as XML documents. Installer available here contains aset of Color Themes.

There is also a special tool that allows users to create their own Color Themes. It is called Winamp Color Editor. Thanks to this it is very simple and easy to do.

1. Downloading additional Color Themes

You can download special installer that allows you to install plenty of different Color Themes created by You and shared with us in this thread. It also allows to install Winamp Color Editor.

Installation process is very easy and intuitive. Installer contains also Color Themes for Modern Skin. It contains also Winamp Color Editor. You can find more informations here.

After having finished you should start Winamp with Bento (or Big Bento) as active skin. If Winamp is already running hit F5 if Bento is active otherwise select Bento as your active skin.
You can access the new Color Themes in the same list as the default ones are implemented.
Have fun with them and check this thread for new Themes from time to time.

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Installer translation:
You can help and do a translation of Color Themes Installer.

As it was mentioned earlier, in order to create Color Themes you should download Winamp Color Editor and start to edit / create themes with it (color themes installer now contains Color Editor (v2.2.1)).
Do not forget to click 'Save Themes' when you close Winamp or refresh the skin.
To submit your themes click the 'Export' button and post the new theme(s)code as quote/php in this thread.

You're restarting Winamp after adding the new themes, right? It seems Winamp doesn't "see" the new themes until you've reboot winamp. Maybe an idea for a future build, a "flush theme-cache" or something to that effect?

Okay, this was a bit tricky, because it would seem as though "Window Text" controls both Window Text AND Column Header Text.

Unless I'm missing something, there really needs to be a separate 'Column Text' gamma group, so we can set it to a different color than Window Text. An 'Inactive Background' gamma group would also be nice :-)

Basically, I've tried to recreate the Winamp Modern Default theme more accurately than the one which is currently shipped.

I came into a problem which you'll see in the screenshots, where the text for "Search" and "xxxx items..." should be a shade of white/gray (like it is in Winamp Modern skin), but this then makes the Column Header text the same shade (which is obviously too light, heh, and needs to be a grey/black shade). I'd prefer this one, if only the ML Column Header text was a grey/black shade.
See Winamp_Modern_2.xml / modern_white.jpg

If I change "Window Text" to a grey/black shade, then this makes the Column Header text the right color, but then also makes "Search" and "xxxx items..." the same shade, and also automatically makes the inactive/highlighted item background a sickly shade of blue (and not true to Winamp Modern). So I can't win either way. Though I guess this one would have to end up being the choice out of the two, for now, heh.
See Winamp_Modern_3.xml / modern_black.jpg

Unzip the two xml files to you know where....
(if you don't know where, then see my first post above)

probably a bit late now but there are already thousands of colour themes for the modern skin, for consistency across the suite it would have been nice if the current stock of themes were able to be used in Bento, that way pretty much everyone can still use their favourite colour theme in the new skin, yes I know its a new skin but you will still get people wanting a similar colour theme to what they use in the modern skin, the only issue there is it will still look different due to the darkness of the skin compared to the modern, the other option would have been to control everything with an RGB picker

Hello, I am not new in Winamp, but I consider myself new in this forum.
I am Darwin of Winamp-is (Spanish) and this it is my subject of beto Winamp, its name is Human Winamp, similar to Ubuntu Linux.
I leave the file them and I hope that they like.

See how in the first screenshot of Winamp Modern skin, the background for the active item in the ml tree is bright blue, and the inactive background for the selected item in the Tracks pane is a paler blue....

See in the 2nd screenshot how all 3 highlighted items have the same background, whereas two of them are inactive and should be that paler blue shade. Changing the values for "SelectionBg Inactive" doesn't have any effect.

The first version is in triple-digit downloads so I guess I should update it, heh. Preview and attachment below (you can just delete the old version). I toned the text brightness down a bit between the two. It got to be headache inducing on certain monitors. I also made the colors more uniform, trying to keep the same RGB levels for the various blues.

See how in the first screenshot of Winamp Modern skin, the background for the active item in the ml tree is bright blue, and the inactive background for the selected item in the Tracks pane is a paler blue....

See in the 2nd screenshot how all 3 highlighted items have the same background, whereas two of them are inactive and should be that paler blue shade. Changing the values for "SelectionBg Inactive" doesn't have any effect.

Maybe a problem on your end Egg? See screenshot below ; the sliders work fine for me. You sure you're working with a clone and not the original, locked theme? Just asking; it's often the little things we look past

Hmm, sure, it could just be me being stupid, but could you let me know if you clone the Bento 'Winamp Modern' theme and adjust SelectionBg Inactive, does it change for you?

Confirmed: SelectionBg Inactive does work for me with a clone of Modern.

fatherg.googlepages.com/moderninactive.jpg

Not a case of overlooking it at all, looks like you've got a bug.
-edit-

Something occured to me; in addition to updating the themes with the above code, I also added it to the color-presets.xml file inside of \\Winamp\Skins\Winamp Bento\xml. Think that could have something to do with it?